27-3m的平方(因式分解)
问题描述:
27-3m的平方(因式分解)
答
27-3m^2=3(9-m^2)=3(3+m)(3-m)
答
27-3m^2
=3*(9-m^2)
=3(3+m)(3-m)
答
3(3+m)(3-m)
答
楼上正解~
=3(9-m²)
=3(3+m)(3-m)
答
=3(9-m²)
=3(3+m)(3-m)